DOC AIRBUS | TSM A320FTLA in Take Off Fault on EIU-1
TASK 73-25-00-810-A97-A
TLA in Take Off Fault on EIU-1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 73-25-00-710-536-A ** ON A/C NOT FOR ALL
Subtask 73-25-00-810-398-A ** ON A/C NOT FOR ALL
Subtask 73-25-00-860-150-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:36:48 UTC
TLA in Take Off Fault on EIU-1
1. Possible Causes
- aircraft wiring
- EIU-1 [1KS1]
- AEVC [10HQ]
- PRESS CONT 1 [11HL]
- PRESS CONT 2 [12HL]
- CONT-AIR COND SYSTEM 1 [47HH]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AWM 212608 | |
| AMM 21-26-34-000-001 | Removal of the Avionics Equipment Ventilation Computer (AEVC) |
| AMM 21-26-34-400-001 | Installation of the Avionics Equipment Ventilation Computer (AEVC) |
| AWM 213108 | |
| AMM 21-31-34-000-001 | Removal of the Cabin Pressure Controller |
| AMM 21-31-34-400-001 | Installation of the Cabin Pressure Controller |
| AWM 216105 | |
| AMM 21-61-34-000-002 | Removal of the Air-Conditioning System Controller |
| AMM 21-61-34-400-002 | Installation of the Air-Conditioning System Controller |
| AWM 732505 | |
| AMM 73-25-34-000-802 | Removal of the Engine Interface Unit (EIU) |
| AMM 73-25-34-400-802 | Installation of the Engine Interface Unit (EIU) |
| AMM 73-25-34-710-802 | Operational Test of the Engine Interface Unit (EIU) with the Centralized Fault Display System (CFDS) |
| AMM 73-25-34-860-803 | Engine Interface Unit (EIU) DISCRETE OUTPUTS Simulation |
| AWM 752505 |
Subtask 73-25-00-710-536-A ** ON A/C NOT FOR ALL
A. Do the operational test of the Engine Interface Unit (EIU) with the Centralized Fault Display System (CFDS) to confirm this fault AMM 73-25-34-710-802.
4. Fault IsolationSubtask 73-25-00-810-398-A ** ON A/C NOT FOR ALL
A. If there is confirmation of the fault:
(1) Remove all components connected to EIU-1 (1KS1) Discrete Output (DSO) 11.
(a) Remove the Avionics Equipment Ventilation Computer (AEVC) (10HQ) AMM 21-26-34-000-001.
(b) Remove both Cabin Pressure Controllers (CPC) (11HL and 12HL) AMM 21-31-34-000-001.
(c) Remove the air-conditioning system 1 controller (47HH) AMM 21-61-34-000-002.
(2) On the MCDU, simulate the DSO 11:
(a) Push the adjacent button to DSO 11 to have the status equal to 1 AMM 73-25-34-860-803.
(b) At all controllers rack connectors (AB), do a check for ground at contacts:
1 10A for AEVC (10HQ)
2 7D for CPC 1 (11HL)
3 7D for CPC 2 (12HL)
4 3C for air-conditioning system 1 controller (47HH).
(c) Stop the simulation of DSO 10 AMM 73-25-34-860-803.
(3) If there is no ground, do a check of wiring for continuity (less than 5 ohms resistance) and short to ground:
(a) If there is no ground at all contacts, do a check of wiring between EIU-1 (1KS1) rack contact 1G and 1853VT on SHELF 85VU AWM 732505.
(b) If there is no ground at contact of AEVC controller (10HQ) rack, do a check of wiring between contact 10A of controller (10HQ) rack and 1853VT AWM 212608.
(c) If there is no ground at contacts of CPC (11HL and/or 12HL) rack, do a check of wiring between contact 7D and 1853VT AWM 213108.
(d) If there is no ground at contacts of air-conditioning system 1 controller (47HH) rack, do a check of wiring between contact 3C and 1853VT AWM 216105.
(e) If you find damage, repair or replace aircraft wiring AWM 752505, AWM 212608, AWM 213108 and AWM 216105.
(f) If you find no damage:
1 Replace EIU-1 [1KS1] AMM 73-25-34-000-802 and AMM 73-25-34-400-802.
2 Do the test given in Para. 3.
(4) If there is ground at all contacts (Refer to step 4.A.(2)(b)):
(a) Replace AEVC [10HQ] AMM 21-26-34-000-001 and AMM 21-26-34-400-001.
(c) Do the test given in Para. 3.
(5) If the fault continues:
(a) Replace PRESS CONT 1 [11HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
(b) Do the test given in Para. 3.
(6) If the fault continues:
(a) Replace PRESS CONT 2 [12HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
(b) Do the test given in Para. 3.
(7) If the fault continues:
(a) Replace CONT-AIR COND SYSTEM 1 [47HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.
(b) Do the test given in Para. 3.
5. Close-up(1) Remove all components connected to EIU-1 (1KS1) Discrete Output (DSO) 11.
(a) Remove the Avionics Equipment Ventilation Computer (AEVC) (10HQ) AMM 21-26-34-000-001.
(b) Remove both Cabin Pressure Controllers (CPC) (11HL and 12HL) AMM 21-31-34-000-001.
(c) Remove the air-conditioning system 1 controller (47HH) AMM 21-61-34-000-002.
(2) On the MCDU, simulate the DSO 11:
(a) Push the adjacent button to DSO 11 to have the status equal to 1 AMM 73-25-34-860-803.
(b) At all controllers rack connectors (AB), do a check for ground at contacts:
1 10A for AEVC (10HQ)
2 7D for CPC 1 (11HL)
3 7D for CPC 2 (12HL)
4 3C for air-conditioning system 1 controller (47HH).
(c) Stop the simulation of DSO 10 AMM 73-25-34-860-803.
(3) If there is no ground, do a check of wiring for continuity (less than 5 ohms resistance) and short to ground:
(a) If there is no ground at all contacts, do a check of wiring between EIU-1 (1KS1) rack contact 1G and 1853VT on SHELF 85VU AWM 732505.
(b) If there is no ground at contact of AEVC controller (10HQ) rack, do a check of wiring between contact 10A of controller (10HQ) rack and 1853VT AWM 212608.
(c) If there is no ground at contacts of CPC (11HL and/or 12HL) rack, do a check of wiring between contact 7D and 1853VT AWM 213108.
(d) If there is no ground at contacts of air-conditioning system 1 controller (47HH) rack, do a check of wiring between contact 3C and 1853VT AWM 216105.
(e) If you find damage, repair or replace aircraft wiring AWM 752505, AWM 212608, AWM 213108 and AWM 216105.
(f) If you find no damage:
1 Replace EIU-1 [1KS1] AMM 73-25-34-000-802 and AMM 73-25-34-400-802.
2 Do the test given in Para. 3.
(4) If there is ground at all contacts (Refer to step 4.A.(2)(b)):
(a) Replace AEVC [10HQ] AMM 21-26-34-000-001 and AMM 21-26-34-400-001.
NOTE: Replacement of the controller (10HQ) firstly then other controllers secondly can be reversed.
(b) Install all other controllers (11HL, 12HL and 47HH) AMM 21-31-34-400-001 and AMM 21-61-34-400-002. (c) Do the test given in Para. 3.
(5) If the fault continues:
(a) Replace PRESS CONT 1 [11HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
(b) Do the test given in Para. 3.
(6) If the fault continues:
(a) Replace PRESS CONT 2 [12HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
(b) Do the test given in Para. 3.
(7) If the fault continues:
(a) Replace CONT-AIR COND SYSTEM 1 [47HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.
(b) Do the test given in Para. 3.
Subtask 73-25-00-860-150-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(1) Make sure that the work area is clean and clear of tools and other items.